1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1986, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)route.c 8.3.1.1 (Berkeley) 2/23/95 32 * $FreeBSD$ 33 */ 34 /************************************************************************ 35 * Note: In this file a 'fib' is a "forwarding information base" * 36 * Which is the new name for an in kernel routing (next hop) table. * 37 ***********************************************************************/ 38 39 #include "opt_inet.h" 40 #include "opt_inet6.h" 41 #include "opt_mrouting.h" 42 #include "opt_route.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/malloc.h> 47 #include <sys/mbuf.h> 48 #include <sys/socket.h> 49 #include <sys/sysctl.h> 50 #include <sys/syslog.h> 51 #include <sys/sysproto.h> 52 #include <sys/proc.h> 53 #include <sys/domain.h> 54 #include <sys/eventhandler.h> 55 #include <sys/kernel.h> 56 #include <sys/lock.h> 57 #include <sys/rmlock.h> 58 59 #include <net/if.h> 60 #include <net/if_var.h> 61 #include <net/if_dl.h> 62 #include <net/route.h> 63 #include <net/route/route_ctl.h> 64 #include <net/route/route_var.h> 65 #include <net/route/nhop.h> 66 #include <net/vnet.h> 67 68 #include <netinet/in.h> 69 #include <netinet/ip_mroute.h> 70 71 VNET_PCPUSTAT_DEFINE(struct rtstat, rtstat); 72 73 VNET_PCPUSTAT_SYSINIT(rtstat); 74 #ifdef VIMAGE 75 VNET_PCPUSTAT_SYSUNINIT(rtstat); 76 #endif 77 78 EVENTHANDLER_LIST_DEFINE(rt_addrmsg); 79 80 static int rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *, 81 void *arg); 82 static int rt_exportinfo(struct rtentry *rt, struct rt_addrinfo *info, 83 int flags); 84 85 /* 86 * route initialization must occur before ip6_init2(), which happenas at 87 * SI_ORDER_MIDDLE. 88 */ 89 static void 90 route_init(void) 91 { 92 93 nhops_init(); 94 } 95 SYSINIT(route_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, route_init, NULL); 96 97 struct rib_head * 98 rt_table_init(int offset, int family, u_int fibnum) 99 { 100 struct rib_head *rh; 101 102 rh = malloc(sizeof(struct rib_head), M_RTABLE, M_WAITOK | M_ZERO); 103 104 /* TODO: These details should be hidded inside radix.c */ 105 /* Init masks tree */ 106 rn_inithead_internal(&rh->head, rh->rnh_nodes, offset); 107 rn_inithead_internal(&rh->rmhead.head, rh->rmhead.mask_nodes, 0); 108 rh->head.rnh_masks = &rh->rmhead; 109 110 /* Save metadata associated with this routing table. */ 111 rh->rib_family = family; 112 rh->rib_fibnum = fibnum; 113 #ifdef VIMAGE 114 rh->rib_vnet = curvnet; 115 #endif 116 117 tmproutes_init(rh); 118 119 /* Init locks */ 120 RIB_LOCK_INIT(rh); 121 122 nhops_init_rib(rh); 123 124 /* Init subscription system */ 125 rib_init_subscriptions(rh); 126 127 /* Finally, set base callbacks */ 128 rh->rnh_addaddr = rn_addroute; 129 rh->rnh_deladdr = rn_delete; 130 rh->rnh_matchaddr = rn_match; 131 rh->rnh_lookup = rn_lookup; 132 rh->rnh_walktree = rn_walktree; 133 rh->rnh_walktree_from = rn_walktree_from; 134 135 return (rh); 136 } 137 138 static int 139 rt_freeentry(struct radix_node *rn, void *arg) 140 { 141 struct radix_head * const rnh = arg; 142 struct radix_node *x; 143 144 x = (struct radix_node *)rn_delete(rn + 2, NULL, rnh); 145 if (x != NULL) 146 R_Free(x); 147 return (0); 148 } 149 150 void 151 rt_table_destroy(struct rib_head *rh) 152 { 153 154 RIB_WLOCK(rh); 155 rh->rib_dying = true; 156 RIB_WUNLOCK(rh); 157 158 #ifdef FIB_ALGO 159 fib_destroy_rib(rh); 160 #endif 161 162 tmproutes_destroy(rh); 163 164 rn_walktree(&rh->rmhead.head, rt_freeentry, &rh->rmhead.head); 165 166 nhops_destroy_rib(rh); 167 168 rib_destroy_subscriptions(rh); 169 170 /* Assume table is already empty */ 171 RIB_LOCK_DESTROY(rh); 172 free(rh, M_RTABLE); 173 } 174 175 /* 176 * Adds a temporal redirect entry to the routing table. 177 * @fibnum: fib number 178 * @dst: destination to install redirect to 179 * @gateway: gateway to go via 180 * @author: sockaddr of originating router, can be NULL 181 * @ifp: interface to use for the redirected route 182 * @flags: set of flags to add. Allowed: RTF_GATEWAY 183 * @lifetime_sec: time in seconds to expire this redirect. 184 * 185 * Retuns 0 on success, errno otherwise. 186 */ 187 int 188 rib_add_redirect(u_int fibnum, struct sockaddr *dst, struct sockaddr *gateway, 189 struct sockaddr *author, struct ifnet *ifp, int flags, int lifetime_sec) 190 { 191 struct rib_cmd_info rc; 192 int error; 193 struct rt_addrinfo info; 194 struct rt_metrics rti_rmx; 195 struct ifaddr *ifa; 196 197 NET_EPOCH_ASSERT(); 198 199 if (rt_tables_get_rnh(fibnum, dst->sa_family) == NULL) 200 return (EAFNOSUPPORT); 201 202 /* Verify the allowed flag mask. */ 203 KASSERT(((flags & ~(RTF_GATEWAY)) == 0), 204 ("invalid redirect flags: %x", flags)); 205 flags |= RTF_HOST | RTF_DYNAMIC; 206 207 /* Get the best ifa for the given interface and gateway. */ 208 if ((ifa = ifaof_ifpforaddr(gateway, ifp)) == NULL) 209 return (ENETUNREACH); 210 ifa_ref(ifa); 211 212 bzero(&info, sizeof(info)); 213 info.rti_info[RTAX_DST] = dst; 214 info.rti_info[RTAX_GATEWAY] = gateway; 215 info.rti_ifa = ifa; 216 info.rti_ifp = ifp; 217 info.rti_flags = flags; 218 219 /* Setup route metrics to define expire time. */ 220 bzero(&rti_rmx, sizeof(rti_rmx)); 221 /* Set expire time as absolute. */ 222 rti_rmx.rmx_expire = lifetime_sec + time_second; 223 info.rti_mflags |= RTV_EXPIRE; 224 info.rti_rmx = &rti_rmx; 225 226 error = rib_action(fibnum, RTM_ADD, &info, &rc); 227 ifa_free(ifa); 228 229 if (error != 0) { 230 /* TODO: add per-fib redirect stats. */ 231 return (error); 232 } 233 234 RTSTAT_INC(rts_dynamic); 235 236 /* Send notification of a route addition to userland. */ 237 bzero(&info, sizeof(info)); 238 info.rti_info[RTAX_DST] = dst; 239 info.rti_info[RTAX_GATEWAY] = gateway; 240 info.rti_info[RTAX_AUTHOR] = author; 241 rt_missmsg_fib(RTM_REDIRECT, &info, flags | RTF_UP, error, fibnum); 242 243 return (0); 244 } 245 246 /* 247 * Routing table ioctl interface. 248 */ 249 int 250 rtioctl_fib(u_long req, caddr_t data, u_int fibnum) 251 { 252 253 /* 254 * If more ioctl commands are added here, make sure the proper 255 * super-user checks are being performed because it is possible for 256 * prison-root to make it this far if raw sockets have been enabled 257 * in jails. 258 */ 259 #ifdef INET 260 /* Multicast goop, grrr... */ 261 return mrt_ioctl ? mrt_ioctl(req, data, fibnum) : EOPNOTSUPP; 262 #else /* INET */ 263 return ENXIO; 264 #endif /* INET */ 265 } 266 267 struct ifaddr * 268 ifa_ifwithroute(int flags, const struct sockaddr *dst, 269 const struct sockaddr *gateway, u_int fibnum) 270 { 271 struct ifaddr *ifa; 272 273 NET_EPOCH_ASSERT(); 274 if ((flags & RTF_GATEWAY) == 0) { 275 /* 276 * If we are adding a route to an interface, 277 * and the interface is a pt to pt link 278 * we should search for the destination 279 * as our clue to the interface. Otherwise 280 * we can use the local address. 281 */ 282 ifa = NULL; 283 if (flags & RTF_HOST) 284 ifa = ifa_ifwithdstaddr(dst, fibnum); 285 if (ifa == NULL) 286 ifa = ifa_ifwithaddr(gateway); 287 } else { 288 /* 289 * If we are adding a route to a remote net 290 * or host, the gateway may still be on the 291 * other end of a pt to pt link. 292 */ 293 ifa = ifa_ifwithdstaddr(gateway, fibnum); 294 } 295 if (ifa == NULL) 296 ifa = ifa_ifwithnet(gateway, 0, fibnum); 297 if (ifa == NULL) { 298 struct nhop_object *nh; 299 300 nh = rib_lookup(fibnum, gateway, NHR_NONE, 0); 301 302 /* 303 * dismiss a gateway that is reachable only 304 * through the default router 305 */ 306 if ((nh == NULL) || (nh->nh_flags & NHF_DEFAULT)) 307 return (NULL); 308 ifa = nh->nh_ifa; 309 } 310 if (ifa->ifa_addr->sa_family != dst->sa_family) { 311 struct ifaddr *oifa = ifa; 312 ifa = ifaof_ifpforaddr(dst, ifa->ifa_ifp); 313 if (ifa == NULL) 314 ifa = oifa; 315 } 316 317 return (ifa); 318 } 319 320 /* 321 * Copy most of @rt data into @info. 322 * 323 * If @flags contains NHR_COPY, copies dst,netmask and gw to the 324 * pointers specified by @info structure. Assume such pointers 325 * are zeroed sockaddr-like structures with sa_len field initialized 326 * to reflect size of the provided buffer. if no NHR_COPY is specified, 327 * point dst,netmask and gw @info fields to appropriate @rt values. 328 * 329 * if @flags contains NHR_REF, do refcouting on rt_ifp and rt_ifa. 330 * 331 * Returns 0 on success. 332 */ 333 int 334 rt_exportinfo(struct rtentry *rt, struct rt_addrinfo *info, int flags) 335 { 336 struct rt_metrics *rmx; 337 struct sockaddr *src, *dst; 338 struct nhop_object *nh; 339 int sa_len; 340 341 nh = rt->rt_nhop; 342 if (flags & NHR_COPY) { 343 /* Copy destination if dst is non-zero */ 344 src = rt_key(rt); 345 dst = info->rti_info[RTAX_DST]; 346 sa_len = src->sa_len; 347 if (dst != NULL) { 348 if (src->sa_len > dst->sa_len) 349 return (ENOMEM); 350 memcpy(dst, src, src->sa_len); 351 info->rti_addrs |= RTA_DST; 352 } 353 354 /* Copy mask if set && dst is non-zero */ 355 src = rt_mask(rt); 356 dst = info->rti_info[RTAX_NETMASK]; 357 if (src != NULL && dst != NULL) { 358 /* 359 * Radix stores different value in sa_len, 360 * assume rt_mask() to have the same length 361 * as rt_key() 362 */ 363 if (sa_len > dst->sa_len) 364 return (ENOMEM); 365 memcpy(dst, src, src->sa_len); 366 info->rti_addrs |= RTA_NETMASK; 367 } 368 369 /* Copy gateway is set && dst is non-zero */ 370 src = &nh->gw_sa; 371 dst = info->rti_info[RTAX_GATEWAY]; 372 if ((nhop_get_rtflags(nh) & RTF_GATEWAY) && 373 src != NULL && dst != NULL) { 374 if (src->sa_len > dst->sa_len) 375 return (ENOMEM); 376 memcpy(dst, src, src->sa_len); 377 info->rti_addrs |= RTA_GATEWAY; 378 } 379 } else { 380 info->rti_info[RTAX_DST] = rt_key(rt); 381 info->rti_addrs |= RTA_DST; 382 if (rt_mask(rt) != NULL) { 383 info->rti_info[RTAX_NETMASK] = rt_mask(rt); 384 info->rti_addrs |= RTA_NETMASK; 385 } 386 if (nhop_get_rtflags(nh) & RTF_GATEWAY) { 387 info->rti_info[RTAX_GATEWAY] = &nh->gw_sa; 388 info->rti_addrs |= RTA_GATEWAY; 389 } 390 } 391 392 rmx = info->rti_rmx; 393 if (rmx != NULL) { 394 info->rti_mflags |= RTV_MTU; 395 rmx->rmx_mtu = nh->nh_mtu; 396 } 397 398 info->rti_flags = rt->rte_flags | nhop_get_rtflags(nh); 399 info->rti_ifp = nh->nh_ifp; 400 info->rti_ifa = nh->nh_ifa; 401 if (flags & NHR_REF) { 402 if_ref(info->rti_ifp); 403 ifa_ref(info->rti_ifa); 404 } 405 406 return (0); 407 } 408 409 /* 410 * Lookups up route entry for @dst in RIB database for fib @fibnum. 411 * Exports entry data to @info using rt_exportinfo(). 412 * 413 * If @flags contains NHR_REF, refcouting is performed on rt_ifp and rt_ifa. 414 * All references can be released later by calling rib_free_info(). 415 * 416 * Returns 0 on success. 417 * Returns ENOENT for lookup failure, ENOMEM for export failure. 418 */ 419 int 420 rib_lookup_info(uint32_t fibnum, const struct sockaddr *dst, uint32_t flags, 421 uint32_t flowid, struct rt_addrinfo *info) 422 { 423 RIB_RLOCK_TRACKER; 424 struct rib_head *rh; 425 struct radix_node *rn; 426 struct rtentry *rt; 427 int error; 428 429 KASSERT((fibnum < rt_numfibs), ("rib_lookup_rte: bad fibnum")); 430 rh = rt_tables_get_rnh(fibnum, dst->sa_family); 431 if (rh == NULL) 432 return (ENOENT); 433 434 RIB_RLOCK(rh); 435 rn = rh->rnh_matchaddr(__DECONST(void *, dst), &rh->head); 436 if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) { 437 rt = RNTORT(rn); 438 /* Ensure route & ifp is UP */ 439 if (RT_LINK_IS_UP(rt->rt_nhop->nh_ifp)) { 440 flags = (flags & NHR_REF) | NHR_COPY; 441 error = rt_exportinfo(rt, info, flags); 442 RIB_RUNLOCK(rh); 443 444 return (error); 445 } 446 } 447 RIB_RUNLOCK(rh); 448 449 return (ENOENT); 450 } 451 452 /* 453 * Releases all references acquired by rib_lookup_info() when 454 * called with NHR_REF flags. 455 */ 456 void 457 rib_free_info(struct rt_addrinfo *info) 458 { 459 460 ifa_free(info->rti_ifa); 461 if_rele(info->rti_ifp); 462 } 463 464 /* 465 * Delete Routes for a Network Interface 466 * 467 * Called for each routing entry via the rnh->rnh_walktree() call above 468 * to delete all route entries referencing a detaching network interface. 469 * 470 * Arguments: 471 * rt pointer to rtentry 472 * nh pointer to nhop 473 * arg argument passed to rnh->rnh_walktree() - detaching interface 474 * 475 * Returns: 476 * 0 successful 477 * errno failed - reason indicated 478 */ 479 static int 480 rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *nh, void *arg) 481 { 482 struct ifnet *ifp = arg; 483 484 if (nh->nh_ifp != ifp) 485 return (0); 486 487 /* 488 * Protect (sorta) against walktree recursion problems 489 * with cloned routes 490 */ 491 if ((rt->rte_flags & RTF_UP) == 0) 492 return (0); 493 494 return (1); 495 } 496 497 /* 498 * Delete all remaining routes using this interface 499 * Unfortuneatly the only way to do this is to slog through 500 * the entire routing table looking for routes which point 501 * to this interface...oh well... 502 */ 503 void 504 rt_flushifroutes_af(struct ifnet *ifp, int af) 505 { 506 KASSERT((af >= 1 && af <= AF_MAX), ("%s: af %d not >= 1 and <= %d", 507 __func__, af, AF_MAX)); 508 509 rib_foreach_table_walk_del(af, rt_ifdelroute, ifp); 510 } 511 512 void 513 rt_flushifroutes(struct ifnet *ifp) 514 { 515 516 rib_foreach_table_walk_del(AF_UNSPEC, rt_ifdelroute, ifp); 517 } 518 519 /* 520 * Look up rt_addrinfo for a specific fib. Note that if rti_ifa is defined, 521 * it will be referenced so the caller must free it. 522 * 523 * Assume basic consistency checks are executed by callers: 524 * RTAX_DST exists, if RTF_GATEWAY is set, RTAX_GATEWAY exists as well. 525 */ 526 int 527 rt_getifa_fib(struct rt_addrinfo *info, u_int fibnum) 528 { 529 const struct sockaddr *dst, *gateway, *ifpaddr, *ifaaddr; 530 struct epoch_tracker et; 531 int needref, error, flags; 532 533 dst = info->rti_info[RTAX_DST]; 534 gateway = info->rti_info[RTAX_GATEWAY]; 535 ifpaddr = info->rti_info[RTAX_IFP]; 536 ifaaddr = info->rti_info[RTAX_IFA]; 537 flags = info->rti_flags; 538 539 /* 540 * ifp may be specified by sockaddr_dl 541 * when protocol address is ambiguous. 542 */ 543 error = 0; 544 needref = (info->rti_ifa == NULL); 545 NET_EPOCH_ENTER(et); 546 547 /* If we have interface specified by the ifindex in the address, use it */ 548 if (info->rti_ifp == NULL && ifpaddr != NULL && 549 ifpaddr->sa_family == AF_LINK) { 550 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)ifpaddr; 551 if (sdl->sdl_index != 0) 552 info->rti_ifp = ifnet_byindex(sdl->sdl_index); 553 } 554 /* 555 * If we have source address specified, try to find it 556 * TODO: avoid enumerating all ifas on all interfaces. 557 */ 558 if (info->rti_ifa == NULL && ifaaddr != NULL) 559 info->rti_ifa = ifa_ifwithaddr(ifaaddr); 560 if (info->rti_ifa == NULL) { 561 const struct sockaddr *sa; 562 563 /* 564 * Most common use case for the userland-supplied routes. 565 * 566 * Choose sockaddr to select ifa. 567 * -- if ifp is set -- 568 * Order of preference: 569 * 1) IFA address 570 * 2) gateway address 571 * Note: for interface routes link-level gateway address 572 * is specified to indicate the interface index without 573 * specifying RTF_GATEWAY. In this case, ignore gateway 574 * Note: gateway AF may be different from dst AF. In this case, 575 * ignore gateway 576 * 3) final destination. 577 * 4) if all of these fails, try to get at least link-level ifa. 578 * -- else -- 579 * try to lookup gateway or dst in the routing table to get ifa 580 */ 581 if (info->rti_info[RTAX_IFA] != NULL) 582 sa = info->rti_info[RTAX_IFA]; 583 else if ((info->rti_flags & RTF_GATEWAY) != 0 && 584 gateway->sa_family == dst->sa_family) 585 sa = gateway; 586 else 587 sa = dst; 588 if (info->rti_ifp != NULL) { 589 info->rti_ifa = ifaof_ifpforaddr(sa, info->rti_ifp); 590 /* Case 4 */ 591 if (info->rti_ifa == NULL && gateway != NULL) 592 info->rti_ifa = ifaof_ifpforaddr(gateway, info->rti_ifp); 593 } else if (dst != NULL && gateway != NULL) 594 info->rti_ifa = ifa_ifwithroute(flags, dst, gateway, 595 fibnum); 596 else if (sa != NULL) 597 info->rti_ifa = ifa_ifwithroute(flags, sa, sa, 598 fibnum); 599 } 600 if (needref && info->rti_ifa != NULL) { 601 if (info->rti_ifp == NULL) 602 info->rti_ifp = info->rti_ifa->ifa_ifp; 603 ifa_ref(info->rti_ifa); 604 } else 605 error = ENETUNREACH; 606 NET_EPOCH_EXIT(et); 607 return (error); 608 } 609 610 void 611 rt_updatemtu(struct ifnet *ifp) 612 { 613 struct rib_head *rnh; 614 int mtu; 615 int i, j; 616 617 /* 618 * Try to update rt_mtu for all routes using this interface 619 * Unfortunately the only way to do this is to traverse all 620 * routing tables in all fibs/domains. 621 */ 622 for (i = 1; i <= AF_MAX; i++) { 623 mtu = if_getmtu_family(ifp, i); 624 for (j = 0; j < rt_numfibs; j++) { 625 rnh = rt_tables_get_rnh(j, i); 626 if (rnh == NULL) 627 continue; 628 nhops_update_ifmtu(rnh, ifp, mtu); 629 } 630 } 631 } 632 633 #if 0 634 int p_sockaddr(char *buf, int buflen, struct sockaddr *s); 635 int rt_print(char *buf, int buflen, struct rtentry *rt); 636 637 int 638 p_sockaddr(char *buf, int buflen, struct sockaddr *s) 639 { 640 void *paddr = NULL; 641 642 switch (s->sa_family) { 643 case AF_INET: 644 paddr = &((struct sockaddr_in *)s)->sin_addr; 645 break; 646 case AF_INET6: 647 paddr = &((struct sockaddr_in6 *)s)->sin6_addr; 648 break; 649 } 650 651 if (paddr == NULL) 652 return (0); 653 654 if (inet_ntop(s->sa_family, paddr, buf, buflen) == NULL) 655 return (0); 656 657 return (strlen(buf)); 658 } 659 660 int 661 rt_print(char *buf, int buflen, struct rtentry *rt) 662 { 663 struct sockaddr *addr, *mask; 664 int i = 0; 665 666 addr = rt_key(rt); 667 mask = rt_mask(rt); 668 669 i = p_sockaddr(buf, buflen, addr); 670 if (!(rt->rt_flags & RTF_HOST)) { 671 buf[i++] = '/'; 672 i += p_sockaddr(buf + i, buflen - i, mask); 673 } 674 675 if (rt->rt_flags & RTF_GATEWAY) { 676 buf[i++] = '>'; 677 i += p_sockaddr(buf + i, buflen - i, &rt->rt_nhop->gw_sa); 678 } 679 680 return (i); 681 } 682 #endif 683 684 void 685 rt_maskedcopy(struct sockaddr *src, struct sockaddr *dst, struct sockaddr *netmask) 686 { 687 u_char *cp1 = (u_char *)src; 688 u_char *cp2 = (u_char *)dst; 689 u_char *cp3 = (u_char *)netmask; 690 u_char *cplim = cp2 + *cp3; 691 u_char *cplim2 = cp2 + *cp1; 692 693 *cp2++ = *cp1++; *cp2++ = *cp1++; /* copies sa_len & sa_family */ 694 cp3 += 2; 695 if (cplim > cplim2) 696 cplim = cplim2; 697 while (cp2 < cplim) 698 *cp2++ = *cp1++ & *cp3++; 699 if (cp2 < cplim2) 700 bzero((caddr_t)cp2, (unsigned)(cplim2 - cp2)); 701 } 702 703 /* 704 * Announce interface address arrival/withdraw 705 * Returns 0 on success. 706 */ 707 int 708 rt_addrmsg(int cmd, struct ifaddr *ifa, int fibnum) 709 { 710 711 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE, 712 ("unexpected cmd %d", cmd)); 713 KASSERT((fibnum >= 0 && fibnum < rt_numfibs), 714 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 715 716 EVENTHANDLER_DIRECT_INVOKE(rt_addrmsg, ifa, cmd); 717 718 if (V_rt_add_addr_allfibs) 719 fibnum = RT_ALL_FIBS; 720 return (rtsock_addrmsg(cmd, ifa, fibnum)); 721 } 722 723 /* 724 * Announce kernel-originated route addition/removal to rtsock based on @rt data. 725 * cmd: RTM_ cmd 726 * @rt: valid rtentry 727 * @nh: nhop object to announce 728 * @fibnum: fib id or RT_ALL_FIBS 729 * 730 * Returns 0 on success. 731 */ 732 int 733 rt_routemsg(int cmd, struct rtentry *rt, struct nhop_object *nh, 734 int fibnum) 735 { 736 737 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE, 738 ("unexpected cmd %d", cmd)); 739 740 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs), 741 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 742 743 KASSERT(rt_key(rt) != NULL, (":%s: rt_key must be supplied", __func__)); 744 745 return (rtsock_routemsg(cmd, rt, nh, fibnum)); 746 } 747 748 /* 749 * Announce kernel-originated route addition/removal to rtsock based on @rt data. 750 * cmd: RTM_ cmd 751 * @info: addrinfo structure with valid data. 752 * @fibnum: fib id or RT_ALL_FIBS 753 * 754 * Returns 0 on success. 755 */ 756 int 757 rt_routemsg_info(int cmd, struct rt_addrinfo *info, int fibnum) 758 { 759 760 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE || cmd == RTM_CHANGE, 761 ("unexpected cmd %d", cmd)); 762 763 KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs), 764 ("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs)); 765 766 KASSERT(info->rti_info[RTAX_DST] != NULL, (":%s: RTAX_DST must be supplied", __func__)); 767 768 return (rtsock_routemsg_info(cmd, info, fibnum)); 769 } 770